SealSend

Digital invitations with RSVP tracking, guest messaging and check-in, for one-off hosts and event planners.

SealSend lets a host design an invitation, send it by email or SMS, and watch responses come in. Guests RSVP from a public event page without creating an account. Planners who run events for clients get team workspaces, their own branding, client review links and webhooks into their other tools. It is a full-stack Next.js app backed by PostgreSQL, with Stripe billing and Mailgun/Twilio delivery.

Features

Events and invitations

• Step-by-step event wizard: details, design upload, customization, custom RSVP fields, guest list and preview
• Optional AI draft: describe the event and get a structured draft for the host to review; the model is told not to invent venues, prices or dates, and every assumption is flagged for confirmation (OpenAI, with a non-AI fallback)
• Event templates, one-click clone for repeat events, and a publish readiness check before invitations go out
• Public event page with add-to-calendar (Google, Apple, Outlook / .ics), comments and a sign-up board

Guests and RSVPs

• Guest list with CSV import (partial imports and duplicate detection), tags, plus-ones and custom questions
• Response table, RSVP summary and analytics, CSV export
• Email and SMS invitations, reminders (manual or automatic) and announcements with audience selection and SMS cost preview
• Per-guest magic links and QR codes, plus a check-in screen for the door

For event organizers

• Workspaces with owner, admin, planner and check-in roles
• Brand kit: logo, colours, email sender name and SMS signature on every event
• Clients: client records, read-only review links with live RSVP totals, recorded approvals and per-client history
• Signed webhooks for RSVPs, check-ins, publishing and client approvals, for Zapier, Make or your own CRM (docs)

Accounts, billing and safety

• Passwordless sign-in with 6-digit email or SMS codes (password sign-in also supported), database-backed sessions
• Stripe billing for a free tier, one-time Event Pass, annual Pro and SMS top-ups. During the controlled beta (BETA_MODE in src/lib/constants.ts) paid checkout is turned off and every account gets the beta plan
• Test-only switches for payments and outbound messages, plus opt-out and suppression handling for SMS and email
• Account data export and deletion, rate limiting, upload quotas, and a Content Security Policy with HSTS and frame-ancestors 'none'
• Web app manifest, so it can be added to a home screen

Tech stack

Area	Technology
Framework	Next.js 16 (App Router), React 19, TypeScript
Database	PostgreSQL 16 with raw SQL via pg
Styling and UI	Tailwind CSS 4, Radix UI Tooltip, Framer Motion, Lucide icons
Forms and validation	React Hook Form, Zod
Email / SMS	Mailgun, Twilio
Payments	Stripe
AI drafts	OpenAI Responses API (structured JSON output)
Testing	Node test runner with tsx, Playwright, axe-core
Packaging	Docker (multi-stage Dockerfile)

Getting started

Prerequisites: Node.js 20+, PostgreSQL 16, and Mailgun, Twilio and Stripe accounts (test credentials are fine for local work).

git clone https://github.com/camster91/SealSend.git
cd SealSend
npm install
cp .env.example .env.local   # fill in values; see comments in .env.example

Keep PAYMENTS_TEST_ONLY=true and COMMUNICATIONS_TEST_ONLY=true outside production.

Set up the database:

# Fresh database
psql "$DATABASE_URL" -v ON_ERROR_STOP=1 -f src/lib/db/schema.sql

# Upgrading an existing database (idempotent)
psql "$DATABASE_URL" -v ON_ERROR_STOP=1 -f apply-security-indexes.sql

Run it:

npm run dev      # http://localhost:3000
npm run build
npm run start

docker-compose.yml builds and runs the web container (point DATABASE_URL at your PostgreSQL instance).

Testing

npm run typecheck
npm run lint          # zero warnings allowed
npm test              # unit and readiness tests
npm run test:e2e      # Playwright end-to-end, accessibility and visual tests
npm run test:config   # check provider configuration
npm run test:email    # send a test email
npm run test:sms      # send a test SMS

Project structure

src/
  app/
    (marketing)/   public site: home, pricing, use cases, legal
    (auth)/        sign-in, sign-up, password reset
    (dashboard)/   events, guests, responses, check-in, settings
    e/[slug]/      public event and RSVP page
    client/        client review links
    api/           route handlers (events, RSVPs, billing, webhooks, cron)
  components/      UI, wizard, dashboard and public-event components
  lib/             auth, db, email/SMS, billing, AI, webhooks, validation
tests/             unit tests and Playwright specs (tests/e2e)
scripts/           admin, beta and test utilities
docs/              feature and operations docs

Documentation

• docs/webhooks.md: webhook events and signature verification
• docs/AUTOMATIC_REMINDERS.md: reminder scheduling
• docs/product-strategy-organizer-platform.md: product direction for one-off hosts and organizers

License

GNU Affero General Public License v3.0 only (AGPL-3.0-only). See LICENSE. Copyright (c) 2026 Cameron Ashley.

You can use, modify and self-host SealSend. If you run a modified version as a network service, you must offer every user who interacts with it the complete source of your version under the same licence. The app shows that offer through SourceCodeLink (marketing footer, dashboard and sign-in pages); set NEXT_PUBLIC_SOURCE_CODE_URL to your own repository, and add the link to guest-facing pages (/e/[slug], invitations, /client/[token]) too if your version changes them.

Code published before the switch to AGPL on 2026-09-26 (up to commit 7361786) was released under MIT, and copies obtained under that licence keep it.

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Built by Cameron Ashley (Ashbi Design).